Xe274H-10 needs 4.10's for that car.
Xe274 or 12-672-4 cs nostalgia 30-30h+ or Isky 278 mega cam
All these cams will need 4.10's. a 3500 stall is best with all a these.
3.55:1 use a smaller cam .
12-672-4 This cam will be particilarly lame with just 3.55's.
Needs a 3500++4000 stall and 4.30-4.56
You must fully port a vortec heads to see the benefit of a large than stock valve.
Larger valves and full porting will work well.